Your Flying Flivver 69 



method of changing the blade angle is featured in Stout's 

 craft. 



The Autogiro 



"What is the difference between the autogiro and the heli- 

 copter?" you may wonder. 



The autogiro has a propeller in front like an ordinary plane, 

 plus wings on top which revolve as the propeller pulls the 

 plane through the air. These wings revolve solely as the result 

 of the plane's motion through the air. The helicopter has no 

 propeller in front. Its engine is attached directly to the blades 

 on top, which enable it to ascend and descend vertically. The 

 autogiro is easier to Candle than the conventional plane. It 

 takes off and lands in small places. But it is not as controllable 

 as the helicopter. 



The Pitcairn-Larsen Autogiro Company manufactures a 

 craft that takes a smooth hop, skip, and jump in getting off 

 the ground. If the motor fails, the revolving blades let the 

 plane down gently. These blades can also be folded back to 

 convert the autogiro into a passenger car. 



The Convertaplane 



Proponents of the Convertaplane say that everything we 

 have written about the helicopter is doubly true of this half- 

 helicopter-half-plane invented and developed by Gerard P. 

 Herrick, noted aeronautical engineer and instructor in the 

 United States Army Air Corps during the first World War. 



Like the helicopter, the Convertaplane will hover in mid- 

 air, climb straight up, or settle slowly down; but it will also 

 convert from a rotary- wing craft to a three hundred-mile-an- 

 hour airplane in mid-air. The Convertaplane looks like the 

 conventional biplane, but there is a big difference. The slim 



